Olmedillo de Roa has a very active occupation since prehistoric ages. During the Bronze and Iron Ages there was a great diversity of settlements of short duration, due to the itinerant economic activities of these population groups. It conserves a set of noble and civil architecture with surprising inscriptions in some of its stalls and interesting constructions of the 19th century as it is the house of the XIX century, in the square of the town . On the other hand, it maintains its circular urban structure, inherited from its medieval past. The town houses the La Asunción de Ntra. Sra. Church built in the sixteenth century by Juan de Navacea.

As well as the Virgen de Basardilla Hermitage, on a nearby hill, baroque but with Gothic vestiges inside. In its exterior it highlights its bulrush and its large pilasters.

Gentilicy of Olmedillo de Roa: Olmedillenses.